(9) Mount Everest
The only reason we didn't ramp it all the way up to a 10 is because Beloved is so out there and creepy that it's a page-turner no matter how tough it is.
Why is so complex? For starters, every word means something deep; every random object is a symbol or metaphor for something. In other words, it's stuff that your English teachers go gaga over. And—you guessed it—the ideas match the writing.
If you're a little scared of that Mount Everest rating, that's natural, but don't let that stop you from scaling the mountain. The payoff is huge. Your brain will definitely thank you.